This wasn't fun... Never a good day when one has to work on a sprinkler leak while laying on your back underneath a sidewalk. Gotta say I was proud of my guys for working on this one. And to answer the questions, I too did get in the hole after trying to follow the explanation of what made up this nightmare. Reached a point, gotta see it for yourself. All 3 lines were broken. Hours later. Plumbed up, pressured up and covered up. A shower has never felt so good in my life. Second picture is of the finished work. Originally the 1" pipe was blocking us from working on the 1/2" pipe and was all contained in a pre-existing sleeve. They changed up the shape of the sidewalk and left this for us to find on our own.